Multiple choice

If the cost price of 18 pens is equal to the selling price of 12 pens, what is the gain percent?

  1. 12.5%

  2. 22.5%

  3. 50%

  4. 36%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

18 * CP = 12 * SP. SP/CP = 18/12 = 3/2. Gain = (3-2)/2 = 1/2 = 50%.

AI explanation

Since the cost price of 18 pens equals the selling price of 12 pens, the ratio of selling price to cost price for a single pen is 18 to 12, which simplifies to 1.5. Using the gain percent formula, ((1.5 minus 1) divided by 1) multiplied by 100 gives a profit of 50%.

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